ICP NXH560GKA100 Installation guide

Brand: ICP

Model: NXH560GKA100

Category: Heat pumps

Type: Installation guide

This manual is also suitable for

428 01 5107 05 07/25/18

INSTALLATION INSTRUCTIONS

R- 410A Split System Heat Pumps

N4H4 / R4H4 / WCH4 / NXH5

These instructions must be read and understood completely before attempting installation.

NOTE: Read the entire instruction manual before starting the

installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,

or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property

damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory–authorized kits or accessories

when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions included in

literature and attached to the unit. Consult local building codes and

current editions of the National Electrical Code (NEC) NFPA 70.

In Canada, refer to current editions of the Canadian electrical code

CSA 22.1.

Recognize safety information. This is the safety–alert symbol

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.

Understand these signal words; DANGER, WARNING, and

CAUTION. These words are used with the safety–alert symbol.

DANGER identifies the most serious h azards which will result in

severe personal injury or death. WARNING signifies hazards

which could result in personal injury or death. CAUTION is used

to identify unsafe practices which may result in minor personal

injury or product and property damage. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability, or

operation.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position.

There may be more than 1 disconnect switch. Lock out and

tag switch with a suitable warning label.

EXPLOSION HAZARD

Failure to follow this warning could

result in death, serious personal injury,

and/or property damage.

Never use air or gases containing

oxygen for leak testing or operating

refrigerant compressors. Pressurized

mixtures of air or gases containing

oxygen can lead to an explosion.

WARNING

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to

gas pulsations from improper installation of equipment.

1. Locate unit away from windows, patios, decks, etc. where

unit operation sound may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate

for unit capacity.

3. Run refrigerant tubes as directly as possible by avoiding un-

necessary turns and bends.

4. Leave some slack between structure and unit to absorb vi-

bration.

5. When passing refrigerant tubes through the wall, seal open-

ing with RTV or other pliable silicon–based caulk (see Fig.

1).

6. Avoid direct tubing contact with water pipes, duct work,

floor joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with

a rigid wire or strap which comes in direct contact with

tubing (see Fig. 1).

8. Ensure that tubing insulation is pliable and completely sur-

rounds vapor tube.

9. When necessary, use hanger straps which are 1 in. wide and

conform to shape of tubing insulation (see Fig. 1).

10. Isolate hanger straps from insulation by using metal sleeves

bent to conform to shape of insulation.

INSULATION

SUCTION TUBE

LIQUID TUBE

OUTDOOR WALL INDOOR WALL

LIQUID TUBE

SUCTION TUBE

INSULATION

CAULK

HANGER STRAP

(AROUND SUCTION

TUBE ONLY)

JOIST

1” (25.4 mm)

MIN

THROUGH THE WALL

SUSPENSION

A07588

Fig. 1 – Connecting Tubing Installation

2 428 01 5107 05

Specifications subject to change without notice.

When outdoor unit is connected to factory–approved indoor unit,

outdoor unit contains system refrigerant charge for operation with

AHRI rated indoor unit when connected by 15 ft. (4.57 m) of

field–supplied or factory accessory tubing. For proper unit

operation, check refrigerant charge using charging information

located on control box cover and/or in the Check Charge section of

this instruction.

IMPORTANT: Maximum liquid–line size is 3/8–in. OD for all

residential applications including long line.

IMPORTANT: Always install the factory–supplied liquid–line

filter drier. Obtain replacement filter driers from your distributor or

branch.

INSTALLATION

IMPORTANT: Effective January 1, 2015, all split system and

packaged air conditioners must be installed pursuant to applicable

regional efficiency standards issued by the Department of Energy.

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when handling

parts.

CAUTION

Check Equipment and Job Site

Unpack Unit

Move to final location. Remove carton taking care not to damage

unit.

Inspect Equipment

File claim with shipping company prior to installation if shipment

is damaged or incomplete. Locate unit rating plate on unit corner

panel. It contains information needed to properly install unit.

Check rating plate to be sure unit matches job specifications.

Install on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tie

down bolts should be used and fastened through knockouts

provided in unit base pan. Refer to unit mounting pattern in Fig. 2

to determine base pan size and knockout hole location.

For hurricane tie downs, contact distributor for details and PE

Certification (Professional Engineer), if required.

On rooftop applications, mount on level platform or frame. Place

unit above a load–bearing wall and isolate unit and tubing set from

structure. Arrange supporting members to adequately support unit

and minimize transmission of vibration to building. Consult local

codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require

wind baffles. Consult the Service Manual – Residential Split

System Air Conditioners and Heat Pumps for wind baffle

construction.

NOTE: Unit must be level to within ±2° (3/8 in/ft,9.5 mm/m)

per compressor manufacturer specifications.

Elevate Unit

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or

improper operation.

Unit must be kept free of an accumulation of water and/or ice in

the basepan.

CAUTION

Elevate unit per local climate and code requirements to provide

clearance above estimated snowfall level and ensure adequate

drainage of unit. If using accessory support feet, use installation

instructions from kit for installation.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or

improper operation.

To prevent damage to the unit, ensure that it is located with the

supports such that the unit is stable in all circumstances including

adverse conditions.

CAUTION

Clearance Requirements

When installing, allow sufficient space for airflow clearance,

wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm)

clearance to service end of unit and 48 in. (1219.2 mm) (above

unit. For proper airflow, a 6–in. (152.4 mm) clearance on 1 side of

unit and 12–in. (304.8 mm) on all remaining sides must be

maintained. Maintain a distance of 24 in. (609.6 mm) between

units or 18 in. (457.2 mm) if no overhang within 12 ft. (3.66 m).

Position so water, snow, or ice from roof or eaves cannot fall

directly on unit.

NOTE: 18” (457.2 mm) clearance option described above is

approved for outdoor units with wire grille coil guard only .

Units with louver panels require 24” (609.6 mm) between units.

On rooftop applications, locate unit at least 6 in. above roof

surface.

3/8–in. (9.53 mm) Dia.

Tiedown Knockouts in

Basepan(2) Places

View From Top

UNIT BASE PAN

Dimension in. (mm)

TIEDOWN KNOCKOUT LOCATIONS in. (mm)

A B C

23 X 23

(585 X 585)

7–3/4 (196.8) 4–13/32 (111.9) 18–1/32 (457.9)

26 X 26

(660 X 660)

9–1/8 (231.8) 4–7/16 (112.7) 21–1/4 (539.8)

31–1/2 X 31–1/ 2

(800 X 800)

9–1/8 (231.8) 6–9/16 (166.7) 24–11/16 (627.1)

35 X 35

(889 X 889)

9–1/8 (231.8) 6–9/16 (166.7) 28–7/16 (722.3)

A05177

Fig. 2 – Tiedown Knockout Locations

Operating Ambient

The minimum outdoor operating ambient in cooling mode without

accessory is 55°F (12.78°C), and the maximum outdoor operating

ambient in cooling mode is 125°F (51.67°C). The maximum

outdoor operating ambient in heating mode is 66 °F (18.89°C).

Check Defr ost Thermostat

Check defrost thermostat to ensure it is properly located and

securely attached. There is a liquid header with a distributor and

feeder tube going into outdoor coil. At the end of the one of the

feeder tubes, there is a 3/8 in. O.D. stub tube approximately 2 in.

(50.8 mm) long (see Fig. 3). The defrost thermostat should be

located on stub tube. Note that there is only one stub tube used

with liquid header , and on most units it is the bottom circuit.

428 01 5107 05 3

Specifications subject to change without notice.

FEEDER TUBE

DEFROST

THERMOSTAT

STUB TUBE

A97517

Fig. 3 – Defrost Thermostat Location

Table 1 – Accessory Usage

Accessory

REQUIRED FOR LOW–AMBIENT

COOLING APPLICATIONS

(Below 55F / 12.8C)

REQUIRED FOR

LONG LINE APPLICATIONS*

REQUIRED FOR

SEA COAST APPLICATIONS

(Within 2 miles / 3.22 km)

Accumulator Standard Standard Standard

Compressor Start Assist Capacitor and

Relay

Ye s Ye s No

Crankcase Heater Ye s

Ye s

Evaporator Freeze Thermostat Ye s No No

Hard Shutoff TXV Ye s Ye s No

Isolation Relay Ye s No No

Liquid Line Solenoid Valve No See Long–Line Application Guideline No

Low Ambient Switch Ye s No No

Support Feet Recommended No Recommended

* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Piping and Longline Guideline. .

Make Piping Connections

WARNING

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could result in personal injury

or death.

Relieve pressure and recover all refrigerant before system

repair or final unit disposal.

Use all service ports and open all flow–control devices,

including solenoid valves.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

If ANY refrigerant tubing is buried, provide a 6–in (152.4

mm). vertical rise at service valve. Refrigerant tubing lengths

up to 36–in (914.4 mm). may be buried without further special

consideration. Do not bury lines longer than 36 in (914.4 mm).

Outdoor units may be connected to indoor section using accessory

tubing package or field–supplied refrigerant grade tubing of correct

size and condition. For tubing requirements beyond 80 ft,

substantial capacity and performance losses can occur. Following

the recommendations in the Residential Piping and Long Line

Guideline will reduce these losses. Refer to Table 1 for accessory

requirements. Refer to Table 2 for field tubing diameters.

There are no buried–line applications greater than 36 in. (914.4

mm)

If refrigerant tubes or indoor coil are exposed to atmosphere, they

must be evacuated to 500 microns to eliminate contamination and

moisture in the system.

Outdoor Unit Connected To Factory Approved Indoor

Unit

Outdoor unit contains approximate system refrigerant charge for

operation with approved AHRI rated indoor unit when connected

by 15 ft (4.57 m) of field–supplied or factory–accessory tubing,

and factory supplied filter drier. Some indoor units require

additional subcooling to achieve optimal heating performance.

Using Table 5 or 6 – Additional Subcooling Required, check

refrigerant charge for maximum efficiency

Service Valves

Service valves are closed and plugged from the factory. Outdoor

units are shipped with a refrigerant charge sealed in the unit. Leave

the service valves closed until all other refrigerant system work is

complete or the charge will be lost. Leave the plugs in place until

line set tubing is ready to be inserted.

Heat pumps require a piston metering device in the liquid service

valve for proper heating operation. Piston is shipped in the piston

body of the liquid service valve, temporarily held in place with a

plastic cap. Do not remove the plastic cap until line set tubing is

ready to be installed.

Refer to Fig. 4 and follow these steps for piston installation:

1. Remove plastic cap holding piston in piston body of liquid

service valve.

2. Check that piston size (stamped on side of piston) matches

with number listed on unit rating plate. Return piston to

piston body of liquid service valve (either direction).

4 428 01 5107 05

Specifications subject to change without notice.

3. Find plastic bag taped to unit containing copper adapter

tube, brass nut, and plastic washer.

4. Install plastic washer in the seat inside piston body.

5. Fit brass nut onto adapter tube and install tube onto liquid

service valve. Tighten nut finger tight, then wrench

additional ½ turn only [15- ft lbs (20.3 N- m)]. Over

tightening may damage the plastic washer and service

valve’s piston body.

PISTON BODY

LIQUID SERVICE VALVE

PISTON

PLASTIC WASHER

ADAPTER TUBE

BRASS NUT

A14235

Fig. 4 – Liquid Service Valve with Heating Piston and

Adapter Tube

VALVE CORE

SERVICE VALVE

A14236

Fig. 5 – Vapor Service Valve

Brazi ng Connections

Connect vapor tube to fitting on outdoor unit vapor service valves

(see Table 2). Connect liquid tubing to adapter tube on liquid

service valve. Use refrigerant grade tubing.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

Service valves must be wrapped in a heat–sinking material

such as a wet cloth while brazing.

Apply heat absorbing paste or heat sink product between service

valve and joint. Wrap service valves with a heat sinking material

such as a wet cloth.

After wrapping service valve with a wet cloth, tubing set can be

brazed to service valve using either silver bearing or non–silver

bearing brazing material. Do not use soft solder (materials which

melt below 800°F/427°C). Consult local code requirements.

NOTE: Some outdoor units contain a mechanical fitting at the

liquid distributor. This connection is not field serviceable and

should not be disturbed.

NOTE: For Liquid Service Valve - Braze lineset to adapter tube

BEFORE bolting adapter to valve. This helps prevent overheating

and damage to plastic washer or o- ring.

For Vapor Service Valve - remove valve core from schrader port

on Service Valve BEFORE brazing. This helps prevent

overheating and damage to valve seals (refer to Fig. 5). Replace

valve core when braz i ng is compl eted.

FIRE HAZARD

Failure to following this warning could result in personal

injury, death and/or property damage.

Refrigerant and oil mixture could ignite and burn as it escapes

and contacts brazing torch. Make sure the refrigerant charge is

properly removed from both the high and low sides of the

system before brazing any component or lines.

WARNING

Clean line set tube ends with emery cloth or steel brush. Remove

any grit or debris.

Insert line set tube ends into service valve tube stubs.

Apply heat absorbing paste or heat sink product between service

valve and joint. Wrap service valves with a heat sinking material

such as a wet cloth.

Braze joints using a Sil- Fos or Phos- copper alloy.

Table 2 – Refrigerant Connections and Recommended Liquid

and Vapor Tube Diameters (In.)

UNIT SIZE

LIQUID RATED VAPOR

Connection

Diameter

Tube

Diameter

Connection

Diameter

Tube

Diameter

18, 24, 30 3/8 3/8 3/4 3/4

36, 42, 48 3/8 3/8 7/8 7/8

60 3/8 3/8 7/8 1–1/8

* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance

data when using different size and length linesets.

Notes:

1. D o not apply capillary tube indoo r coils to these units.

2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or

20 ft. (6.09 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length, refer to

the Residential Piping and Longline Guideline – Air Conditioners and Heat Pumps

using R- 410A refrigerant.

Installing with Indoor Piston

Heat pumps with piston indoor ratings are shipped with the correct

piston size in the accessory bag. Check piston size shipped with

indoor unit to see if it matches required indoor piston size. If it

does not match, replace indoor piston with correct piston size

which is listed on the rating plate.

NOTE: Heat pumps without piston indoor ratings may be

installed as a replacement component in a piston system. When

installing a non- piston rated heat pump with a piston indoor the

correct indoor piston must be installed. When not listed on the

rating plate the correct piston size is listed in the product data.

Replacement pistons can be ordered from Replacement

Components.

13/16” BRASS HEX NUT

TEFLON® SEAL

TEFLON®

RINGS

3/4” BRASS HEX BOD

“H” DISTRIBUTOR

PISTON RETAINER

PISTON

A10342

Fig. 6 – Indoor Piston Installation

428 01 5107 05 5

Specifications subject to change without notice.

Install Liquid Line Filter Drier Indoor

Refer to Fig. 7 and install filter drier as follows:

1. Braze 5 in. (127 mm) liquid tube to the indoor coil.

2. Wrap filter drier with damp cloth.

3. Braze filter drier to 5 in. (127 mm) long liquid tube from

step 1.

4. Connect and braze liquid refrigerant tube to the filter drier.

IMPORTANT: Installation of the filter drier in liquid line is

required.

A05227

Fig. 7 – Liquid Line Filter Drier

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Installation of filter drier in liquid line is required.

Evacuate Refrigerant Tubing and Indoor Coil

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using the

recommended deep vacuum method of 500 microns. The alternate

triple evacuation method may be used (see triple evacuation

procedure in service manual). Always break a vacuum with dry

nitrogen.

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of

pulling a vacuum of 500 microns and a vacuum gage capable of

accurately measuring this vacuum depth. The deep vacuum method

is the most positive way of assuring a system is free of air and

liquid water. A tight dry system will hold a vacuum of 1000

microns after approximately 7 minutes. (See Fig. 8.)

500

MINUTES

01234567

1000

1500

LEAK IN

SYSTEM

VACUUM TIGHT

TOO WET

TIGHT

DRY SYSTEM

2000

MICRONS

2500

3000

3500

4000

4500

5000

A95424

Fig. 8 – Deep Vacuum Graph

Final Tubing Check

IMPORTANT: Check to be certain factory tubing on both indoor

and outdoor unit has not shifted during shipment. Ensure tubes are

not rubbing against each other or any sheet metal. Pay close

attention to feeder tubes, making sure wire ties on feeder tubes are

secure and tight.

Be sure field wiring complies with local and national fire, safety,

and electrical codes, and voltage to system is within limits shown

on unit rating plate. Contact local power company for correction of

improper voltage. See unit rating plate for recommended circuit

protection device.

NOTE: Operation of unit on improper line voltage constitutes

abuse and could affect unit reliability. See unit rating plate. Do not

install unit in system where voltage may fluctuate above or below

permissible limits.

Make Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

Do not supply power to unit with compressor terminal box

cover removed.

NOTE: Use copper wire only between disconnect switch and unit.

NOTE: Install branch circuit disconnect of adequate size per NEC

to handle unit starting current. Locate disconnect within sight from

and readily accessible from unit, per Section 440–14 of NEC.

Route Ground and Power Wires

Remove access panel to gain access to unit wiring. Extend wires

from disconnect through power wiring hole provided and into unit

control box.

Connec t Ground and Power Wires

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or

death.

The unit cabinet must have an uninterrupted or unbroken

ground to minimize personal injury if an electrical fault should

occur. The ground may consist of electrical wire or metal

conduit when installed in accordance with existing electrical

codes.

6 428 01 5107 05

Specifications subject to change without notice.

Connect ground wire to ground connection in control box for

safety. Connect power wiring to contactor as shown in Fig. 9.

DISCONNECT

PER N.E.C. AND/OR

LOCAL CODES

CONTACTOR

GROUND

LUG

FIELD GROUND

WIRING

FIELD POWER

WIRING

BLUE

3 PHASE ONLY

A94025

Fig. 9 – Line Connections

A00010

Fig. 10 – 3–Phase Monitor Control

(Applies to 3–Phase Units Only)

Table 3 – 3–Phase Monitor LED Indicators

LED STATUS

OFF Nocallforcompressoroperation

FLASHING Reversed phase

ON Normal

Connect Control Wiring

Route 24v control wires through control wiring grommet and

connect leads to control wiring. See Thermostat Installation

Instructions for wiring specific unit combinations. (See Fig. 11.)

Use No. 18 AWG color–coded, insulated (35°C minimum) wire. If

thermostat is located more than 100 ft (30.5 m) from unit, as

measured along the control voltage wires, use No. 16 AWG

color–coded wire to avoid excessive voltage drop.

All wiring must be NEC Class 2 and must be separated from

incoming power leads.

Use furnace transformer, fan coil transformer, or accessory

transformer for control power, 24v/40va minimum.

NOTE: Use of available 24v accessories may exceed the

minimum 40va power requirement. Determine total transformer

loading and increase the transformer capacity or split the load with

an accessory transformer as required.

LEGEND

24-V FACTORY WIRING

24-V FIELD WIRING

FIELD SPLICE CONNECTION

OUTDOOR THERMOSTAT

EMERGENCY HEAT RELAY

SUPPLEMENTAL HEAT RELAY

SHR

EHR

ODT

24 VAC HOT

RVS COOLING

HP THERMOSTAT

TYPICAL

FAN COIL

HEAT

PUMP

24 VAC COM

HEAT STAGE 2

COOL/HEAT

STAGE 1

INDOOR FAN

EMERGENCY

HEAT

IF AVAILABLE

A02325 / A97413

Fig. 11 – Generic Wiring Diagrams

(See thermostat Installation Instructions

for specific unit combinations)

Final Wiring Check

IMPORTANT: Check factory wiring and field wire connections

to ensure terminations are secured properly. Check wire routing to

ensure wires are not in contact with tubing, sheet metal, etc.

CompressorCrankcaseHeater

When equipped with a crankcase heater, furnish power to heater a

minimum of 24 hr before starting unit. To furnish power to heater

only, set thermostat to OFF and close electrical disconnect to

outdoor unit.

A crankcase heater is required if refrigerant tubing is longer than

80 ft (23.4 m), or when outdoor unit is 20 ft (6.09 m) below indoor

unit. Refer to the Residential Piping and Long Line Guideline.

Install Electrical Accessories

Refer to the individual instructions packaged with kits or

accessories when installing.

Start–Up

CAUTION

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personal injury.

Wear safety glasses, protective clothing, and gloves when

handling refrigerant and observe the following:

S Front seating service valves are equipped with Schrader valves.

428 01 5107 05 7

Specifications subject to change without notice.

CAUTION

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

damage.

Federal regulations require that you do not vent refrigerant to

the atmosphere. Recover during system repair or final unit

disposal.

CAUTION

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this caution may result in personal injury,

equipment damage or improper operation.

S Do not overcharge system with refrigerant.

S Do not operate unit in a vacuum or at negative pressure.

S Do not disable low pressure switch in scroll compressor

applications.

S Compressor dome temperatures may be hot.

Follow these steps to properly start up system:

1. After system is evacuated, fully open liquid and vapor ser-

vice valves.

2. Unit is shipped with valve stem(s) front seated (closed) and

caps installed. Replace stem caps after system is opened to

refrigerant flow (back seated). Replace caps finger–tight and

tighten with wrench an additional 1/12 turn.

3. Close electrical disconnects to energize system.

4. Set room thermostat at desired temperature. Be sure set

point is below indoor ambient temperature.

5. Set room thermostat to HEAT or COOL and fan control to

ON or AUTO mode, as desired. Operate unit for 15

minutes. Check system refrigerant charge.

Sequence of Operation

Turn on power to indoor and outdoor units. Transformer is

energized.

Cooling

On a call for cooling, thermostat makes circuits R–O and R–Y, and

R–G. Circuit R–O energizes reversing valve, switching it to

cooling position. Circuit R–Y energizes contactor, starting outdoor

fan motor and compressor circuit. R–G energizes indoor unit

blower relay, starting indoor blower motor on high speed.

When thermostat is satisfied, its contacts open, de–energizing

contactor and blower relay. Compressor and motors should stop.

NOTE: If indoor unit is equipped with a time–delay relay circuit,

the indoor blower will run an additional 90 seconds to increase

system efficiency.

Heating

On a call for heating, thermostat makes circuits R–Y and R–G.

Circuit R–Y energizes contactor, starting outdoor fan motor and

compressor. Circuit R–G energizes indoor blower relay, starting

blower motor on high speed.

Should temperature continue to fall, R–W2 is made through

second–stage room thermostat. Circuit R–W2 energizes a relay,

bringing on first bank of supplemental electric heat and providing

electrical potential to second heater relay (if used). If outdoor

temperature falls below setting of outdoor thermostat (field

installed option), contacts close to complete circuit and bring on

second bank of supplemental electric heat.

When thermostat is satisfied, its contacts open, de–energizing

contactor and relay. All heaters and motors should stop.

Defrost

The defrost control is a time/temperature control which includes a

field selectable (quick–connects located at board edge) time period

between defrost cycles (30, 60, or 90 minutes), factory set to either

60 or 90 minutes.

The electronic defrost timer sequence is enabled when the T1 input

on the board is energized. The timer starts only when the defrost

thermostat is closed and the contactor is energized.

Defrost mode is identical to cooling mode except that outdoor fan

motor stops and second–stage heat is turned on to continue

warming conditioned spaces.

To initiate defrost, the defrost thermostat must be closed. This can

be accomplished as follows:

1. Turn off power to outdoor unit.

2. Disconnect outdoor fan motor lead from OF2 on control

board (see Fig. 12). Tape lead to prevent grounding.

3. Restart unit in heating mode, allowing frost to accumulate

on outdoor coil.

4. After a few minutes in heating mode, liquid line temperat-

ure should drop below closing point of defrost thermostat

(approximately 30°F/–1.11°C).

5. Short between speedup terminals with a flat–blade screw-

driver. This reduces the timing sequence to 1/25th of origin-

al time. (See Table 4.)

6. When you hear reversing valve change position, remove

screwdriver immediately; otherwise, control will terminate

normal 10–minute defrost cycle in approximately 2

seconds.

NOTE: Length of defrost cycle is dependent upon length of time

it takes to remove screwdriver from test pins after reversing valve

has shifted.

7. Unit will remain in defrost for remainder of defrost cycle

time or until defrost thermostat reopens at approximately

65°F (18.33°C) coil temperature of liquid line.

8. Turn off power to outdoor unit and reconnect fan motor

lead to OF2 on control board.

8 428 01 5107 05

Specifications subject to change without notice.

OUTDOOR FAN

RELAY

Y OUTPUT TO PRESSURE

SWITCHES AND CONTACTOR

THERMOSTAT INPUTS

T1 - ENABLES DEFROST

TIMER.MUST BE

ENERGIZED FOR

DEFROST TIMER

TO START

C - COMMON

O - REVERSING VALVE

SPEEDUP

DEFROST THERMOSTAT

MUST BE CLOSED BEFORE

DEFROST TIMER BEGINS

A05332

Fig. 12 – Defrost Contro l

Table 4 – Defrost Control Speedup–Timing Sequence

PARAMETER

MINIMUM

(MINUTES)

MAXIMUM

(MINUTES)

SPEEDUP

(NOMINAL)

30–minute cycle 27 33 7sec

60–minute cycle 45 55 12 sec

90–minute cycle 81 99 21 sec

10–minute cycle 9 11 2sec

5 minutes 4.5 5.5 1sec

Check Charge

Factory charge amount and desired subcooling are shown on unit

rating plate. Additional subcooling may be required to achieve

optimal heating performance based on the installed indoor unit.

(see Table 5 or 6).

Charging method is shown on information plate inside unit. For

TXV, use subcooling method. For piston, use superheat method.

To properly check or adjust charge, conditions must be favorable

for subcooling or superheat charging. Favorable conditions exist

when the outdoor temperature is between 70_F and 100_F

(21.11_C and 37.78_C), and the indoor temperature is between

70_F and 80_F (21.11_C and 26.67_C). Follow the procedure

below:

Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge

by adding or removing 0.6 oz/ft (.018 kg/m) of 3/8 liquid line

above or below 15ft (4.57 m) respectively.

For standard refrigerant line lengths (80 ft/24.38 m or less), allow

system to operate in cooling mode at least 15 minutes. If conditions

are favorable, check system char ge by super heat method for fixed

metering device and subcooling method for TXV. If any

adjustment is necessary, adjust charge slowly and allow system to

operate for 15 minutes to stabilize before declaring a properly

charged system. Refer to Table 5 or 6 for additional subcooling

required.

If the indoor temperature is above 80_F (26.67_C), and the

outdoor temperature is in the favorable range, adjust system charge

by weight based on line length and allow the indoor temperature to

drop to 80_F (26.67_C) before attempting to check system charge

by subcooling method as described above.

If the indoor temperature is below 70_F (21.11_C), or the outdoor

temperature is not in the favorable range, adjust charge for line set

length above or below 15ft (4.57 m) only. Charge level should then

be appropriate for the system to achieve rated capacity. The charge

level could then be checked at another time when the both indoor

and outdoor temperatures are in a more favorable range.

NOTE: If line length is beyond 80 ft (24.38 m) or greater than 20

ft (6.10 m) vertical separation, See Residential Piping and Long

Line Guideline for special ch arging requirements.

Units with Cooling Mode TXV

Units installed with cooling mode TXV require char ging by the

subcooling method.

1. Operate unit a minimum of 10 minutes before checking

charge.

2. Measure liquid service valve pressure by attaching an accur-

ate gage to service port.

3. Measure liquid line temperature by attaching an accurate

thermistor type or electronic thermometer to liquid line near

outdoor coil.

4. Refer to unit rating plate for required subcooling temperat-

ure.

5. Refer to Table 8. Find the point where required subcooling

temperature intersects measured liquid service valve pres-

sure.

6. To obtain required subcooling temperature at a specific li-

quid line pressure, add refrigerant if liquid line temperature

is higher than indicated or reclaim refrigerant if temperature

is lower. Allow a tolerance of 3_F.

428 01 5107 05 9

Specifications subject to change without notice.

Units with Indoor Pistons

Units installed with indoor pistons require charging by the

superheat method.

The following procedure is valid when indoor airflow is within

21 percent of its rated CFM.

1. Operate unit a minimum of 10 minutes before checking

charge.

2. Measure suction pressure by attaching an accurate gage to

suction valve service port.

3. Measure suction temperature by attaching an accurate ther-

mistor type or electronic thermometer to suction line at ser-

vice valve.

4. Measure outdoor air dry–bulb temperature with thermomet-

er.

5. Measure indoor air (entering indoor coil) wet–bulb temper-

ature with a sling psychrometer.

6. Refer to Table 9. Find outdoor temperature and evaporator

entering air wet–bulb temperature. At this intersection, note

superheat. Where a dash (––) appears on the table, do not

attempt to charge system under these conditions or refriger-

ant slugging may occur. Charge must be weighted in,

adding or removing 0.6 oz/ft of 3/8 liquid line above or be-

low 15 ft (4.57 m) respectively.

7. Refer to Table 10. Find superheat temperature located in

item 6 and suction pressure. At this intersection, note suc-

tion line temperature.

8. If unit has a higher suction line temperature than charted

temperature, add refrigerant until charted temperature is

reached.

9. If unit has a lower suction line temperature than charted

temperature, reclaim refrigerant until charted temperature is

reached.

10. When adding refrigerant, charge in liquid form into suction

service port using a flow–restricting device.

11. If outdoor air temperature or pressure at suction valve

changes, charge to new suction line temperature indicated

on chart.

12. Optimum performance will be achieved when the operating

charge produces 5_ to 6_F suction superheat at suction

service valve with 82_F outdoor ambient and 80_F

(26.7_C) dry bulb (67_F / 19.4_C) wet bulb) indoor

temperature (DOE “B” test conditions) at rated airflow.

Heating Check Chart Procedure

To check system operation during heating cycle, refer to the

Heating Check Chart on outdoor unit. This chart indicates whether

a correct relationship exists between system operating pressure and

air temperature entering indoor and outdoor units. If pressure and

temperature do not match on chart, system refrigerant charge may

not be correct. Do not use chart to adjust refrigerant charge.

Table 5 – Additional Subcooling Required -

N4H4 / R4H4

Subcooling Delta from Rating Plate Value

Outdoor Unit Tonnage

Indoor Unit | Additional Subcooling Required

18 24 30 36 42 48 60

EA*4X18L14A

EA*4X24L14A

EA*4X30L14A

EA*4X36L14A - EA*4X42L21A

EA*4X48L17A

EA*4X60L21A

EA*4X24L14A

EA*4X24L17A

EA*4X30L17A

EA*4X36L17A - EA*4X42L24A

EA*4X48L21A

EA*4X60L24A

EA*4X24L17A

EA*4X25L17A

EA*4X36L14A

EA*4X36L21A - EA*4X43L21A

EA*4X48L24A

EA*4X61L24A

EN(A,D)4X18L14

EA*4X30L14A

EA*4X36L17A

EA*4X42L21A +3 EA*4X48L17A

EA*4X60L21A

EN(A,D,W)4X60L24

EN(A,D)4X24L14

EA*4X30L17A

EA*4X36L21A

EA*4X42L24A +3 EA*4X48L21A

EA*4X60L24A

EHD4X60AAL

EN(A,D)4X24L17

EN(A,D)4X24L14

EA*4X37L17A

EN(A,D)4X36L21 - EA*4X48L24A

EA*4X61L24A

FEM4X60**BL

EHD4X24AAL

EN(A,D)4X24L17

EA*4X37L21A

EN(A,D,W)4X36L17 - END4X42L17

EN(A,D,W)4X48L21

FVM4X60**AL

FEM4P18**AL

EN(A,D)4X30L14

EN(A,D,W)4X42L21 +3 EN(A,D,W)4X42L21

EN(A,D)4X48L24

FXM4X60**AL

FEM4P24**AL

EN(A,D)4X30L17

END4X42L17 +3 EN(A,D)4X48L24

EN(A,D,W)4X60L24

FEM4X18**BL

EHD4X24AAL

EN(A,D)4X36L21

EHD4X36AAL +3 EN(A,D,W)4X48L21

EHD4X48AAL

FEM4X24**BL

EHD4X30AAL

EN(A,D,W)4X36L17

EHD4X42AAL +5 EHD4X42AAL

EHD4X60AAL

FMA4P18**A

FEM4P30**AL

EHD4X30AAL

FEM4P36**AL - EHD4X48AAL

FEM4P48**AL

FMA4X18**A

FEM4X30**BL

EHD4X36AAL

FEM4P42**AL +5 FEM4P42**AL

FEM4X48**BL

FMA4P24**A

FEM4P30**AL

FEM4X36**BL - FEM4P48**AL

FEM4X60**BL

FMA4X24**A

FEM4P36**AL

FEM4X42**BL +5 FEM4X42**BL

FVM4X48**AL

FM(C,U)4P18**A

FMA4P30**A

FEM4X30**BL

FMA4P36**A - FEM4X48**BL

FVM4X60**AL

FM(C,U)4P24**A

FMA4X30**A

FEM4X36**BL

FMA4X36**A - FVM4X36**AL

FXM4X48**AL

FM(C,U)4X18**A

FM(C,U)4P24**A

FMA4P30**A

FM(C,U)4P36**A - FVM4X48**AL

FXM4X60**AL

FM(C,U)4X24**A

FM(C,U)4P30**A

FMA4X30**A

FVM4X24**AL - FVM4X60**AL

FVM4X36**AL

FM(C,U)4X24**A

FMA4P36**A

FVM4X36**AL - FXM4X42**AL

FVM4X24**AL

FM(C,U)4X30**A

FMA4X36**A

FVM4X48**AL +5 FXM4X48**AL

FXM4X18**AL

FVM4X36**AL

FM(C,U)4P30**A

FVM4X60**AL +5 FXM4X60**AL

FXM4X24**AL

FVM4X24**AL

FM(C,U)4P36**A

FXM4X36**AL +5

FXM4X24**AL

FM(C,U)4X30**A

FXM4X42**AL +5

FXM4X30**AL

FVM4X36**AL

FXM4X48**AL +5

FXM4X36**AL

FVM4X48**AL

FVM4X24**AL

FXM4X30**AL

FXM4X36**AL

FXM4X42**AL

10 428 01 5107 05

Specifications subject to change without notice.

Table 6 – Additional Subcooling Required - WCH4- B

Subcooling Delta from Rating Plate Value

Outdoor Unit Tonnage

Indoor Unit | Additional Subcooling Required

18 24 30 36 42 48 60

WLA*184AA* - WLA*244AA* - WLA*304AA* - WLA*364AA* - WLA*424CA* - WLA*484BA* +5 WLA*604CA* -

WLA*244AA* - WLA*244BA* - WLA*304BA* - WLA*364BA* - WLA*424DA* - WLA*484CA* +3 WLA*604DA* -

WLA*244BA* - WLA*254BA* +5 WLA*364AA* - WLA*364CA* - WLA*434CA* +5 WLA*484DA* +3 WLA*614DA* -

WLNC184AA* - WLA*304AA* - WLA*364BA* - WLA*424CA* +3 WLA*484BA* +5 WLA*604CA* +5 WLN(C,W)604DA* -

WLNC244AA* +3 WLA*304BA* - WLA*364CA* - WLA*424DA* +3 WLA*484CA* +3 WLA*604DA* +5 WAHL604B* -

WLNC244BA* +3 WLNC244AA* - WLA*374BA* +5 WLN(C,W)364BA* - WLA* 484DA* +3 WLA*614DA* +5 WAXL604A* -

WAPL184A* - WLNC244BA* - WLA*374CA* +5 WLNC364CA* - WLNC424BA* - WLN(C,W)484CA* -

WAPL244A* - WLNC304AA* - WLNC304AA* - WLNC424BA* +3 WLN(C,W)424CA* - WLNC484DA* -

WAHL184B* - WLNC304BA* - WLNC304BA* - WLN(C,W)424CA* +3 WLN(C,W)484CA* - WLN(C,W)604DA* +3

WAHL244B* - WAPL304A* - WLN(C,W)364BA* - WAPL364A* - WLNC484DA* - WAPL484A* -

FMA4P18**A* - WAHL304B* - WLNC364CA* - WAPL424A* +5 WAPL424A* - WAHL484B* -

FMA4X18**A* - FMA4P24**A* - WAPL304A* - WAHL364B* - WAPL484A* - WAHL604B* +3

FMA4P24**A* - FMA4X24**A* - WAHL304B* - WAHL424B* +5 WAHL424B* - WAXL484A* +3

FMA4X24**A* - FMA4P30**A* - WAPL364A* - FMA4P36**A* - WAHL484B* - WAXL604A* +5

FM(C,U)4P18**A* - FMA4X30**A* - WAHL364B* - FMA4X36**A* - WAXL424A* -

FM(C,U)4P24**A* - FM(C,U)4P24* *A* - FMA4P30**A* - FM(C,U)4P36**A* - WAXL484A* +3

FM(C,U)4X18**A* - FM(C,U)4P30**A* - FMA4X30**A* - WAXL364A* +5 WAXL604A* +5

FM(C,U)4X24**A* - FM(C,U)4X24**A* - FMA4P36**A* - WAXL424A* +5

WAXL184A* +3 FM(C,U)4X30**A* - FMA4X36**A* - WAXL484A* +5

WAXL244A* +3 WAXL244A* - FM(C,U)4P30**A* -

WAXL304A* - FM(C,U)4P36**A* -

WAXL364A* +5 FM(C,U)4X30**A* -

WAXL304A* -

WAXL364A* +5

WAXL424A* +5

428 01 5107 05 11

Specifications subject to change without notice.

Table 7 – Additional Subcooling Required - NXH5 - Subcooling Delta from Rating Plate Value

OUTDOOR UNIT TONNAGE

Indoor Models 18 24 30 36 42 48 60

ED*4X18B**/EA*4X18*14A* --

EN(A,D)4X18*14** --

FEM4(P,X)18**A*+TXV --

F(E,S)A4X18**A* --

FXM4X18**A* --

FS(M,U)4P18**A*+TXV --

ED*4X24***/EA*4X24*(14,17)A* -- --

EN*4X24***** -- --

EHD4X24A** -- --

FEM4P24**A*+TXV -- --

F(E,S)A4X24**A* -- --

(FVM/FCM)4X24**** +3 -- --

FXM4X24**A* -- --

FEM4X24**A* -- --

FS(M,U)4P24**A*+TXV -- --

ED*4X30***/EA*4X30*(14,17)A* -- -

EN*4X30***** -- -

EHD4X30A** -- -

FEM4(P,X)30**A*+TXV -- -

FSA4X30**A* -- -

FEA4X30**A* -- -

FXM4X30**A* +3 -

FS(M,U)4P30**A*+TXV +3 -

(FVM/FCM)4X36**** -- --

ED*4X36***/EA*4X36*(14,17,21)A* -- --

EN*4X36***** -- --

EHD4X36A** -- --

FEM4P36**A*+TXV -- --

FSA4X36**A* -- --

FEA4X36**A* -- --

F(E,X)M4X36**A* +5 --

FS(M,U)4P36**A*+TXV -- --

ED*4X42***/EA*4X42*(21,24)A* -- --

EN*4X42*21** -- --

END4X42*17** -- --

EHD4X42A** -- --

FEM4(P,X)42**A*+TXV -- --

FXM4X42**A* -- --

FS(M,U)4P42**A*+TXV -- --

ED*4X48F**/EA*4X48*17A* +5 --

ED*4X48(J,L)**/EA*4X48*(21,24)A* +3 --

EN*4X48***** -- --

EHD4X48A** -- --

FEM4P48**A*+TXV -- --

(FVM/FCM)4X48**** +3 +3 +3 - --

F(E,X)M4X48**A* +3 --

FS(M,U)4P48**A*+TXV +3 --

ED*4X60***/EA*4X60*(21,24)A* +5 --

EN*4X60*24** -- --

EHD4X60A** +3 -

FEM4X60**B* -- -

(FVM/FCM)4X60**** +5 +5 +3 -

FXM4X60**A* +3 --

FS(M,U)4X60**A* +3 --

12 428 01 5107 05

Specifications subject to change without notice.

Table 8 – Required Liquid Line Temperatures _F

LIQUID PRESSURE AT

SERVICE VALVE (PSIG)

REQUIRED SUBCOOLING TEMPERATURE (° F)

8 10 12 14 16 18

251 76 74 72 70 68 66

259 78 76 74 72 70 68

266 80 78 76 74 72 70

274 82 80 78 76 74 72

283 84 82 80 78 76 74

291 86 84 82 80 78 76

299 88 86 84 82 80 78

308 90 88 86 84 82 80

317 92 90 88 86 84 82

326 94 92 90 88 86 84

335 96 94 92 90 88 86

345 98 96 94 92 90 88

354 100 98 96 94 92 90

364 102 100 98 96 94 92

374 104 102 100 98 96 94

384 106 104 102 100 98 96

395 108 106 104 102 100 98

406 110 108 106 104 102 100

416 112 110 108 106 104 102

427 114 112 110 108 106 104

439 116 114 112 110 108 106

450 118 116 114 112 110 108

462 120 118 116 114 112 110

474 122 120 118 116 114 112

486 124 122 120 118 116 114

499 126 124 122 120 118 116

511 128 126 124 122 120 118

Table 9 – Superheat Charging (Heat Pump Only)

OUTDOOR TEMP (° F)

EVAPORATOR ENTERING AIR TEMPERATURE (° F WB)

50 52 54 56 58 60 62 64 67 68 70 72 74 76

55 11 11 12 12 12 13 17 20 24 24 25 25 25 25

60 6 6 7 7 7 7 12 16 21 22 23 23 23 23

65 – – – – – 3 7 12 18 19 21 21 22 22

70 – – – – – – – 7 14 16 18 20 20 20

75 – – – – – – – 3 11 13 16 18 18 19

82 – – – – – – – – *6 8 12 15 16 17

85 – – – – – – – – 4 7 11 14 15 16

90 – – – – – – – – – 4 8 12 14 15

95 – – – – – – – – – – 6 10 12 14

100 – – – – – – – – – – 4 8 11 12

105 – – – – – – – – – – 3 6 9 11

110 – – – – – – – – – – – 5 7 10

115 – – – – – – – – – – – 3 6 8

*Optimum performance point, 82° F outdoor ambient and (80° F dry bulb),( 67° F wet bulb) indoor conditions. (DOE B Test Conditions)

Where a dash (––) appears do not attempt to charge system under these conditions or refrigerant slugging may occur. Charge must be weighed in.

Note: Superheat ° F is at low–side service port, Allow a tolerance of ± 3° F

Note: Indoor dry bulb between 70° F and 80° F

Table 10 – Required Suction–Line Temperature

SUPERHEAT TEMP (° F)

SUCTION PRESSURE AT SERVICE PORT (PSIG)

107.8 112.2 116.8 121.2 126 130.8 138.8 140.8 145.8

0 35 37 39 41 43 45 47 49 51

2 37 39 41 43 45 47 49 51 53

4 39 41 43 45 47 49 51 53 55

6 41 43 45 47 49 51 53 55 57

8 43 45 47 49 51 53 55 57 59

10 45 47 49 51 53 55 57 59 61

12 47 49 51 53 55 57 59 61 63

14 49 51 53 55 57 59 61 63 65

16 51 53 55 57 59 61 63 65 67

18 53 55 57 59 61 63 65 67 69

20 55 57 59 61 63 65 67 69 71

22 57 59 61 63 65 67 69 71 73

24 59 61 63 65 67 69 71 73 75

26 61 63 65 67 69 71 73 75 77

28 63 65 67 69 71 73 75 77 79

30 65 67 69 71 73 75 77 79 81

428 01 5107 05 13

Specifications subject to change without notice.

FINAL CHECKS

IMPORTANT: Before leaving job, be sure to do the following:

1. Ensure that all wiring is routed away from tubing and sheet

metal edges to prevent rub–through or wire pinching.

2. Ensure that all wiring and tubing is secure in unit before

adding panels and covers. Securely fasten all panels and

covers.

3. Tighten service valve stem caps to 1/12–turn past finger

tight.

4. Leave Owner’s Manual with owner. Explain system opera-

tion and periodic maintenance requirements outlined in

manual.

5. Fill out Dealer Installation Checklist and place in customer

file.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible

equipment failure, periodic maintenance must be performed on this

equipment.

Frequency of maintenance may vary depending upon geographic

areas, such as coastal applications. See Users Manual for

information.

R- 410A REFRIGERANT QUICK REFERENCE GUIDE

S R- 410A refrigerant operates at 50 - 70 percent higher pressures than R - 22. Be sure that servicing equipment and replacement

components are designed to operate with R- 410A refrigerant

S R- 410A refrigerant cylinders are rose colored.

S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.

S R- 410A refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose

when charging into suction line with compressor operating

S Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low- side retard.

S Use hoses with 700 psig service pressure rating.

S Leak detectors should be designed to detect HFC refrigerant.

S R- 410A refrigerant, as with other HFCs, is only compatible with POE oils.

S Vacuum pumps will not remove moisture from oil.

S Do not use liquid- line filter driers with rated working pressures less than 600 psig.

S Do not leave R- 410A suction line filter driers in line longer than 72 hours.

S Do not install a suction- line filter drier in liquid line.

S POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

S POE oils may cause damage to certain plastics and roofing materials.

S Wrap all filter driers and service valves with wet cloth when brazing.

S A factory approved liquid- line filter drier is required on every unit.

S Do NOT use an R- 22 TXV.

S If indoor unit is equipped with an R- 22 TXV or piston metering device, it must be changed to a hard shutoff R- 410A TXV.

S Never open system to atmosphere while it is under a vacuum.

S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter driers.

Evacuate to 500 microns prior to recharging.

S Do not vent R- 410A refrigerant into the atmosphere.

S Do not use capillary tube coils.

S Observe all warnings, cautions,andbold text.

S All indoor coils must be installed with a hard shutoff R- 410A TXV metering device.

Lewisburg, TN 37091 USA

ICP NXH560GKA100 Installation guide

Brand: ICP

Model: NXH560GKA100

Category: Heat pumps

Type: Installation guide

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